Weich et al. described the usefulness of CXCR4-directed imaging with the novel PET tracer [68Ga]Ga-Pentixafor as an alternative to [18F]FDG in poorly differentiated NEC; 11 patients were enrolled (the primary tumour, when identified, was located in the stomach, pancreas, oesophagus, ileum and rectum). The gene discussed is CXCR4; the disease is neoplasm.